/*
 * File    : TrackerWebContextImpl.java
 * Created : 23-Jan-2004
 * By      : parg
 * 
 * Azureus - a Java Bittorrent client
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package org.gudy.azureus2.pluginsimpl.local.tracker;

/**
 * @author parg
 *
 */

import java.net.InetAddress;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.gudy.azureus2.core3.tracker.server.TRTrackerServer;
import org.gudy.azureus2.core3.tracker.server.TRTrackerServerAuthenticationListener;
import org.gudy.azureus2.core3.tracker.server.TRTrackerServerException;
import org.gudy.azureus2.core3.tracker.server.TRTrackerServerFactory;
import org.gudy.azureus2.core3.tracker.server.TRTrackerServerListener2;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.plugins.tracker.Tracker;
import org.gudy.azureus2.plugins.tracker.TrackerException;
import org.gudy.azureus2.plugins.tracker.web.TrackerAuthenticationAdapter;
import org.gudy.azureus2.plugins.tracker.web.TrackerAuthenticationListener;

public class TrackerWebContextImpl extends TrackerWCHelper implements TRTrackerServerListener2, TRTrackerServerAuthenticationListener {
    protected TRTrackerServer server;

    protected List<TrackerAuthenticationListener> auth_listeners = new ArrayList<TrackerAuthenticationListener>();

    public TrackerWebContextImpl(TrackerImpl _tracker, String name, int port, int protocol, InetAddress bind_ip)

    throws TrackerException {
        setTracker(_tracker);

        try {

            if (protocol == Tracker.PR_HTTP) {

                server = TRTrackerServerFactory.create(name, TRTrackerServerFactory.PR_TCP, port, bind_ip, false, false);

            } else {

                server = TRTrackerServerFactory.createSSL(name, TRTrackerServerFactory.PR_TCP, port, bind_ip, false, false);
            }

            server.addListener2(this);

        } catch (TRTrackerServerException e) {

            throw (new TrackerException("TRTrackerServerFactory failed", e));
        }
    }

    public String getName() {
        return (server.getName());
    }

    public void setEnableKeepAlive(boolean enable) {
        server.setEnableKeepAlive(enable);
    }

    public URL[] getURLs() {
        try {
            URL url = new URL((server.isSSL() ? "https" : "http") + "://" + server.getHost() + ":" + server.getPort() + "/");

            // quick fix for badly specified host whereby a valid URL is constructed but the port lost. For example, if#
            // someone has entered http://1.2.3.4 as the host

            if (url.getPort() != server.getPort()) {

                Debug.out("Invalid URL '" + url + "' - check tracker configuration");

                url = new URL("http://i.am.invalid:" + server.getPort() + "/");
            }

            return (new URL[] { url });

        } catch (MalformedURLException e) {

            Debug.printStackTrace(e);

            return (null);
        }
    }

    public InetAddress getBindIP() {
        return (server.getBindIP());
    }

    public boolean authenticate(String headers, URL resource, String user, String password) {
        for (int i = 0; i < auth_listeners.size(); i++) {

            try {
                TrackerAuthenticationListener listener = auth_listeners.get(i);

                boolean res;

                if (listener instanceof TrackerAuthenticationAdapter) {

                    res = ((TrackerAuthenticationAdapter) listener).authenticate(headers, resource, user, password);

                } else {

                    res = listener.authenticate(resource, user, password);
                }

                if (res) {

                    return (true);
                }
            } catch (Throwable e) {

                Debug.printStackTrace(e);
            }
        }

        return (false);
    }

    public byte[] authenticate(URL resource, String user) {
        for (int i = 0; i < auth_listeners.size(); i++) {

            try {
                byte[] res = ((TrackerAuthenticationListener) auth_listeners.get(i)).authenticate(resource, user);

                if (res != null) {

                    return (res);
                }
            } catch (Throwable e) {

                Debug.printStackTrace(e);
            }
        }

        return (null);
    }

    public void addAuthenticationListener(TrackerAuthenticationListener l) {
        try {
            this_mon.enter();

            auth_listeners.add(l);

            if (auth_listeners.size() == 1) {

                server.addAuthenticationListener(this);
            }
        } finally {

            this_mon.exit();
        }
    }

    public void removeAuthenticationListener(TrackerAuthenticationListener l) {
        try {
            this_mon.enter();

            auth_listeners.remove(l);

            if (auth_listeners.size() == 0) {

                server.removeAuthenticationListener(this);
            }
        } finally {

            this_mon.exit();
        }
    }

    public void destroy() {
        super.destroy();

        auth_listeners.clear();

        server.removeAuthenticationListener(this);

        server.close();
    }
}
